نتایج جستجو برای: pore pressure dissipation

تعداد نتایج: 469259  

Journal: :International Journal of Scientific & Engineering Research 2015

Journal: :Geotechnique 2023

The Skempton pore pressure coefficient, B, is defined as the variation in with unit change confining under undrained conditions. B parameter an essential to consider coupled effects of solid–fluid compressibility and skeleton a porous system. It key factor exploring possible definition effective stress frozen soil. However, limited experimental theoretical research available literature give ins...

Journal: :International journal of GEOMATE : geotechnique, construction materials and environment 2021

Liquefaction is one of the causesof ground and structural damages during earthquake. The occurrence liquefaction earthquake caused by contractive behavior loose sands subjected to cyclic loading. Due this phenomenon, soil deposits will lose its strength, causing deformation settlement. In study, seismic response road embankment with proposed countermeasures analyzedby conducting a centrifuge mo...

Journal: :Physical review 2021

Mechanical waves, which are commonly employed for the noninvasive characterization of fluid-saturated porous media, tend to induce pore-scale fluid pressure gradients. The corresponding relaxation process is referred as squirt flow and associated viscous dissipation can significantly affect waves' amplitudes velocities. This, in turn, implies that measurements contain key information about flow...

2013
Bruce E. Shaw

Previous work has shown that velocity-weakening friction produces slip complexity in simple dynamical models of earthquake faults ( Carlson and Langer, 1989). Rere I show that a different type of dynamical instability, caused by slipweakening friction, also produces slip complexity. The deterministically chaotic slip complexity produced by slip-weakening friction in a simple one dimensional mod...

Journal: :Computers & Geosciences 2012
Yu-xin Jie Yan-feng Wen Gang Deng Rui Chen Xu Ze-ping

Generally seepage analysis and stress–strain analysis are conducted separately in the analysis of dams with varied water levels, which neglects the impact of soil deformation on seepage. The impact, however, is significant when the water level varies greatly. In this study, a simplified approach for consolidation analysis of unsaturated soil is used to conduct numerical simulations of water-fil...

2000
D. Chang M. A. Ioannidis I. Chatzis

Pore network models are used to relate fundamental pore structure parameters (pore body and pore throat size distributions) to the distribution of water at the pore level and the decay of proton magnetization under conditions of primary drainage in water-wet rocks. The simulations reveal conditions under which diffusive coupling between pores has a significant effect on the decay spectra and pr...

2012
R. K. Chadha

Hydroseismicity was proposed to explain the occurrence of intraplate earthquakes in regions. Koyna Warna region one of the reservoir triggered seismicity zone in India, which is an example of intraplate earthquake region. The seismicity is continuing after 45 years of impoundment of the Koyna reservoir in 1961 and 25 years of impoundment of Warna reservoir in 1985. The excess of previous maximu...

2009
Nabil Sultan Antonio Cattaneo Jean-Claude Sibuet Jean-Luc Schneider

The swath bathymetric data acquired during the “Sumatra Aftershocks” cruise from the Sunda trench in the Indian Ocean to the north of the Sumatra Island imaged several scars and deposits. In situ pore pressure measurements using the Ifremer piezometer and coring demonstrate that high excess pore pressure and sediment deformation was generated by a recent event in the scar of the slope failure z...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2013
Steffen Berg Holger Ott Stephan A Klapp Alex Schwing Rob Neiteler Niels Brussee Axel Makurat Leon Leu Frieder Enzmann Jens-Oliver Schwarz Michael Kersten Sarah Irvine Marco Stampanoni

Newly developed high-speed, synchrotron-based X-ray computed microtomography enabled us to directly image pore-scale displacement events in porous rock in real time. Common approaches to modeling macroscopic fluid behavior are phenomenological, have many shortcomings, and lack consistent links to elementary pore-scale displacement processes, such as Haines jumps and snap-off. Unlike the common ...

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